Multidimensional encoding of restricted and anisotropic diffusion by double rotation of the <italic>q</italic> vector
Abstract Diffusion NMR and MRI methods building on the classic pulsed gradient spin-echo sequence are sensitive to many aspects of translational motion, including time and frequency dependence (“restriction”), anisotropy, and flow, leading to ambiguities when interpreting experimental data from complex heterogeneous materials such as living biological tissues. While the oscillating gradient technique specifically targets frequency dependence and permits control of the sensitivity to flow, tensor-valued encoding enables investigations of anisotropy in orientationally disordered materials. Here, we propose a simple scheme derived from the “double-rotation” technique in solid-state NMR to generate a family of modulated gradient waveforms allowing for comprehensive exploration of the 2D frequency–anisotropy space and convenient investigation of both restricted and anisotropic diffusion with a single multidimensional acquisition protocol, thereby combining the desirable characteristics of the oscillating gradient and tensor-valued encoding techniques. The method is demonstrated by measuring multicomponent isotropic Gaussian diffusion in simple liquids, anisotropic Gaussian diffusion in a polydomain lyotropic liquid crystal, and restricted diffusion in a yeast cell sediment.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Multidimensional encoding of restricted and anisotropic diffusion by double rotation of the
q vector ; volume:4 ; number:1 ; year:2023 ; pages:73-85 ; extent:13
Magnetic resonance ; 4, Heft 1 (2023), 73-85 (gesamt 13)
- Creator
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Jiang, Hong
Svenningsson, Leo
Topgaard, Daniel
- DOI
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10.5194/mr-4-73-2023
- URN
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urn:nbn:de:101:1-2023033005435659617298
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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14.08.2025, 10:58 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Jiang, Hong
- Svenningsson, Leo
- Topgaard, Daniel
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